如何更改JTable标题高度？
标题解释了这个问题。 我怎么能轻易做到这一点？
import java.awt.*; import java.awt.event.*; import java.util.List; import java.util.Arrays; import javax.swing.*; import javax.swing.table.*; public class TableHeaderHeightTest { private static int HEADER_HEIGHT = 32; private JTable makeTable() { JTable table = new JTable(new DefaultTableModel(2, 20)); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); return table; } public JComponent makeUI() { JPanel p = new JPanel(new GridLayout(2,1)); JTable table1 = makeTable(); //Bad: >>>> JTableHeader header = table1.getTableHeader(); //Dimension d = header.getPreferredSize(); //d.height = HEADER_HEIGHT; //header.setPreferredSize(d); //addColumn case test header.setPreferredSize(new Dimension(100, HEADER_HEIGHT)); p.add(makeTitledPanel("Bad: JTableHeader#setPreferredSize(...)", new JScrollPane(table1))); //<<<< JTable table2 = makeTable(); JScrollPane scroll = new JScrollPane(table2); scroll.setColumnHeader(new JViewport() { @Override public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.height = HEADER_HEIGHT; return d; } }); // //or // table2.setTableHeader(new JTableHeader(table2.getColumnModel()) { // @Override public Dimension getPreferredSize() { // Dimension d = super.getPreferredSize(); // d.height = HEADER_HEIGHT; // return d; // } // }); p.add(makeTitledPanel("Override getPreferredSize()", scroll)); final List list = Arrays.asList(table1, table2); JPanel panel = new JPanel(new BorderLayout()); panel.add(p); panel.add(new JButton(new AbstractAction("addColumn") { @Override public void actionPerformed(ActionEvent e) { for(JTable t: list) { t.getColumnModel().addColumn(new TableColumn()); JTableHeader h = t.getTableHeader(); Dimension d = h.getPreferredSize(); System.out.println(d); } } }), BorderLayout.SOUTH); panel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5)); return panel; } private static JComponent makeTitledPanel(String title, JComponent c) { JPanel p = new JPanel(new BorderLayout()); p.add(c); p.setBorder(BorderFactory.createTitledBorder(title)); return p; } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } public static void createAndShowGUI() { JFrame f = new JFrame(); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.getContentPane().add(new TableHeaderHeightTest().makeUI()); f.setSize(320, 320); f.setLocationRelativeTo(null); f.setVisible(true); } } 试试这个…..
if jtable attached to scrollpane then table.getTableHeader().setPreferredSize( new Dimension(scrollpane.getwidth(),height) ); else table.getTableHeader().setPreferredSize( new Dimension(width,height) );
尝试这个
JTableHeader th = table.getTableHeader(); th.setPreferredSize(new Dimension(100, 100));
而不是像在aterai答案中那样覆盖JViewport.getPreferredSize，您可以设置首选宽度。
JScrollPane scroll = new JScrollPane(table2); scroll.getColumnHeader().setPreferredSize(new Dimension(0, HEADER_HEIGHT));
JScrollPane忽略列标题宽度，因此您可以在此处安全地设置零。
Font bigFont = new Font("sansserif", Font.PLAIN, 24); // or whatever myTable.getTableHeader().setFont(bigFont);
这是增加TableHeader的preferredSize的简单方法。 它会增加标题的高度，但如果列名太长，则它们可能不适合横向。
在设置首选标题尺寸时，您还可以使用非常大的宽度，根据列模型中的所需宽度进行截断。
tableHeader.setPreferredSize(new Dimension(10000, HEADER_HEIGHT));